--Erosion, sinking land and sea rise from climate change have killed the Louisiana woods where a 41-year-old Native American chief played as a child.... Not far away in the Mississippi River delta system, middle-school students can stand on islands that emerged the year they were born. NASA is using high-tech airborne systems along with boats and mud-slogging work on islands for a$ 15 million, five-year study of these adjacent areas of Louisiana.... But, largely because of flood-prevention lev